X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fln%2Freorg_tests.rs;h=8fb9badba1c74627547a9c6e712618ae70ddc709;hb=7cfafc98ba2429c6505ad11d9296e1ffe35cf60f;hp=91d5b3070610579474b39737b518c94932e9200d;hpb=45eb0f3186c277d935b870870e1115a10bcbb599;p=rust-lightning diff --git a/lightning/src/ln/reorg_tests.rs b/lightning/src/ln/reorg_tests.rs index 91d5b307..8fb9badb 100644 --- a/lightning/src/ln/reorg_tests.rs +++ b/lightning/src/ln/reorg_tests.rs @@ -9,24 +9,21 @@ //! Further functional tests which test blockchain reorganizations. -use crate::chain::channelmonitor::ANTI_REORG_DELAY; +use crate::chain::channelmonitor::{ANTI_REORG_DELAY, LATENCY_GRACE_PERIOD_BLOCKS}; use crate::chain::transaction::OutPoint; use crate::chain::Confirm; -use crate::ln::channelmanager::{self, ChannelManager}; -use crate::ln::msgs::ChannelMessageHandler; -use crate::util::events::{Event, MessageSendEvent, MessageSendEventsProvider, ClosureReason, HTLCDestination}; +use crate::events::{Event, MessageSendEventsProvider, ClosureReason, HTLCDestination}; +use crate::ln::channelmanager::ChannelManager; +use crate::ln::msgs::{ChannelMessageHandler, Init}; use crate::util::test_utils; use crate::util::ser::Writeable; +use crate::util::string::UntrustedString; -use bitcoin::blockdata::block::{Block, BlockHeader}; use bitcoin::blockdata::script::Builder; use bitcoin::blockdata::opcodes; use bitcoin::secp256k1::Secp256k1; use crate::prelude::*; -use core::mem; -use bitcoin::hashes::Hash; -use bitcoin::TxMerkleNode; use crate::ln::functional_test_utils::*; @@ -51,8 +48,8 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]); let nodes = create_network(3, &node_cfgs, &node_chanmgrs); - create_announced_chan_between_nodes(&nodes, 0, 1, channelmanager::provided_init_features(), channelmanager::provided_init_features()); - let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, channelmanager::provided_init_features(), channelmanager::provided_init_features()); + create_announced_chan_between_nodes(&nodes, 0, 1); + let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2); // Make sure all nodes are at the same starting height connect_blocks(&nodes[0], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[0].best_block_info().1); @@ -67,7 +64,6 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { check_added_monitors!(nodes[2], 1); get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id()); - let mut header = BlockHeader { version: 0x2000_0000, prev_blockhash: nodes[2].best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: 42, bits: 42, nonce: 42 }; let claim_txn = if local_commitment { // Broadcast node 1 commitment txn to broadcast the HTLC-Timeout let node_1_commitment_txn = get_local_commitment_txn!(nodes[1], chan_2.2); @@ -77,22 +73,18 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { check_spends!(node_1_commitment_txn[1], node_1_commitment_txn[0]); // Give node 2 node 1's transactions and get its response (claiming the HTLC instead). - connect_block(&nodes[2], &Block { header, txdata: node_1_commitment_txn.clone() }); + connect_block(&nodes[2], &create_dummy_block(nodes[2].best_block_hash(), 42, node_1_commitment_txn.clone())); check_added_monitors!(nodes[2], 1); check_closed_broadcast!(nodes[2], true); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate) - check_closed_event!(nodes[2], 1, ClosureReason::CommitmentTxConfirmed); + check_closed_event!(nodes[2], 1, ClosureReason::CommitmentTxConfirmed, [nodes[1].node.get_our_node_id()], 100000); let node_2_commitment_txn = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0); - assert_eq!(node_2_commitment_txn.len(), 3); // ChannelMonitor: 1 offered HTLC-Claim, ChannelManger: 1 local commitment tx, 1 Received HTLC-Claim - assert_eq!(node_2_commitment_txn[1].output.len(), 2); // to-remote and Received HTLC (to-self is dust) - check_spends!(node_2_commitment_txn[1], chan_2.3); - check_spends!(node_2_commitment_txn[2], node_2_commitment_txn[1]); + assert_eq!(node_2_commitment_txn.len(), 1); // ChannelMonitor: 1 offered HTLC-Claim check_spends!(node_2_commitment_txn[0], node_1_commitment_txn[0]); // Make sure node 1's height is the same as the !local_commitment case connect_blocks(&nodes[1], 1); // Confirm node 1's commitment txn (and HTLC-Timeout) on node 1 - header.prev_blockhash = nodes[1].best_block_hash(); - connect_block(&nodes[1], &Block { header, txdata: node_1_commitment_txn.clone() }); + connect_block(&nodes[1], &create_dummy_block(nodes[1].best_block_hash(), 42, node_1_commitment_txn.clone())); // ...but return node 1's commitment tx in case claim is set and we're preparing to reorg vec![node_1_commitment_txn[0].clone(), node_2_commitment_txn[0].clone()] @@ -106,21 +98,19 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { // Give node 1 node 2's commitment transaction and get its response (timing the HTLC out) mine_transaction(&nodes[1], &node_2_commitment_txn[0]); - connect_blocks(&nodes[1], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires + connect_blocks(&nodes[1], TEST_FINAL_CLTV); // Confirm blocks until the HTLC expires let node_1_commitment_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clone(); - assert_eq!(node_1_commitment_txn.len(), 2); // ChannelMonitor: 1 offered HTLC-Timeout, ChannelManger: 1 local commitment tx - assert_eq!(node_1_commitment_txn[0].output.len(), 2); // to-local and Offered HTLC (to-remote is dust) - check_spends!(node_1_commitment_txn[0], chan_2.3); - check_spends!(node_1_commitment_txn[1], node_2_commitment_txn[0]); + assert_eq!(node_1_commitment_txn.len(), 1); // ChannelMonitor: 1 offered HTLC-Timeout + check_spends!(node_1_commitment_txn[0], node_2_commitment_txn[0]); // Confirm node 1's HTLC-Timeout on node 1 - mine_transaction(&nodes[1], &node_1_commitment_txn[1]); + mine_transaction(&nodes[1], &node_1_commitment_txn[0]); // ...but return node 2's commitment tx (and claim) in case claim is set and we're preparing to reorg vec![node_2_commitment_txn.pop().unwrap()] }; check_added_monitors!(nodes[1], 1); check_closed_broadcast!(nodes[1], true); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate) - check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed); + check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed, [nodes[2].node.get_our_node_id()], 100000); // Connect ANTI_REORG_DELAY - 2 blocks, giving us a confirmation count of ANTI_REORG_DELAY - 1. connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2); check_added_monitors!(nodes[1], 0); @@ -130,11 +120,7 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { // Disconnect Node 1's HTLC-Timeout which was connected above disconnect_blocks(&nodes[1], ANTI_REORG_DELAY - 1); - let block = Block { - header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: 42, bits: 42, nonce: 42 }, - txdata: claim_txn, - }; - connect_block(&nodes[1], &block); + connect_block(&nodes[1], &create_dummy_block(nodes[1].best_block_hash(), 42, claim_txn)); // ChannelManager only polls chain::Watch::release_pending_monitor_events when we // probe it for events, so we probe non-message events here (which should just be the @@ -142,11 +128,7 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { expect_payment_forwarded!(nodes[1], nodes[0], nodes[2], Some(1000), true, true); } else { // Confirm the timeout tx and check that we fail the HTLC backwards - let block = Block { - header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: 42, bits: 42, nonce: 42 }, - txdata: vec![], - }; - connect_block(&nodes[1], &block); + connect_block(&nodes[1], &create_dummy_block(nodes[1].best_block_hash(), 42, Vec::new())); expect_pending_htlcs_forwardable_and_htlc_handling_failed!(nodes[1], vec![HTLCDestination::NextHopChannel { node_id: Some(nodes[2].node.get_our_node_id()), channel_id: chan_2.2 }]); } @@ -196,7 +178,7 @@ fn test_counterparty_revoked_reorg() { let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]); let nodes = create_network(2, &node_cfgs, &node_chanmgrs); - let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 500_000_000, channelmanager::provided_init_features(), channelmanager::provided_init_features()); + let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 500_000_000); // Get the initial commitment transaction for broadcast, before any HTLCs are added at all. let revoked_local_txn = get_local_commitment_txn!(nodes[0], chan.2); @@ -222,7 +204,7 @@ fn test_counterparty_revoked_reorg() { // on any of the HTLCs, at least until we get six confirmations (which we won't get). mine_transaction(&nodes[1], &revoked_local_txn[0]); check_added_monitors!(nodes[1], 1); - check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed); + check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed, [nodes[0].node.get_our_node_id()], 1000000); check_closed_broadcast!(nodes[1], true); // Connect up to one block before the revoked transaction would be considered final, then do a @@ -265,17 +247,19 @@ fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_ let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]); let persister: test_utils::TestPersister; let new_chain_monitor: test_utils::TestChainMonitor; - let nodes_0_deserialized: ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>; + let nodes_0_deserialized: ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestRouter, &test_utils::TestLogger>; let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs); *nodes[0].connect_style.borrow_mut() = connect_style; let chan_conf_height = core::cmp::max(nodes[0].best_block_info().1 + 1, nodes[1].best_block_info().1 + 1); - let chan = create_announced_chan_between_nodes(&nodes, 0, 1, channelmanager::provided_init_features(), channelmanager::provided_init_features()); + let chan = create_announced_chan_between_nodes(&nodes, 0, 1); - let channel_state = nodes[0].node.channel_state.lock().unwrap(); - assert_eq!(channel_state.by_id.len(), 1); - assert_eq!(nodes[0].node.short_to_chan_info.read().unwrap().len(), 2); - mem::drop(channel_state); + { + let per_peer_state = nodes[0].node.per_peer_state.read().unwrap(); + let peer_state = per_peer_state.get(&nodes[1].node.get_our_node_id()).unwrap().lock().unwrap(); + assert_eq!(peer_state.channel_by_id.len(), 1); + assert_eq!(nodes[0].node.short_to_chan_info.read().unwrap().len(), 2); + } assert_eq!(nodes[0].node.list_channels()[0].confirmations, Some(10)); assert_eq!(nodes[1].node.list_channels()[0].confirmations, Some(10)); @@ -305,11 +289,10 @@ fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_ let relevant_txids = nodes[0].node.get_relevant_txids(); assert_eq!(relevant_txids.len(), 0); - handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Channel closed because of an exception: Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs."); - check_added_monitors!(nodes[1], 1); { - let channel_state = nodes[0].node.channel_state.lock().unwrap(); - assert_eq!(channel_state.by_id.len(), 0); + let per_peer_state = nodes[0].node.per_peer_state.read().unwrap(); + let peer_state = per_peer_state.get(&nodes[1].node.get_our_node_id()).unwrap().lock().unwrap(); + assert_eq!(peer_state.channel_by_id.len(), 0); assert_eq!(nodes[0].node.short_to_chan_info.read().unwrap().len(), 0); } } @@ -323,12 +306,7 @@ fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_ let chan_0_monitor_serialized = get_monitor!(nodes[0], chan.2).encode(); reload_node!(nodes[0], *nodes[0].node.get_current_default_configuration(), &nodes_0_serialized, &[&chan_0_monitor_serialized], persister, new_chain_monitor, nodes_0_deserialized); - if !reorg_after_reload { - // If the channel is already closed when we reload the node, we'll broadcast a closing - // transaction via the ChannelMonitor which is missing a corresponding channel. - assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1); - nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear(); - } + assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty()); } if reorg_after_reload { @@ -356,11 +334,10 @@ fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_ let relevant_txids = nodes[0].node.get_relevant_txids(); assert_eq!(relevant_txids.len(), 0); - handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Channel closed because of an exception: Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs."); - check_added_monitors!(nodes[1], 1); { - let channel_state = nodes[0].node.channel_state.lock().unwrap(); - assert_eq!(channel_state.by_id.len(), 0); + let per_peer_state = nodes[0].node.per_peer_state.read().unwrap(); + let peer_state = per_peer_state.get(&nodes[1].node.get_our_node_id()).unwrap().lock().unwrap(); + assert_eq!(peer_state.channel_by_id.len(), 0); assert_eq!(nodes[0].node.short_to_chan_info.read().unwrap().len(), 0); } } @@ -370,13 +347,28 @@ fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_ nodes[0].node.test_process_background_events(); // Required to free the pending background monitor update check_added_monitors!(nodes[0], 1); let expected_err = "Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs."; - check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyForceClosed { peer_msg: "Channel closed because of an exception: ".to_owned() + expected_err }); - check_closed_event!(nodes[0], 1, ClosureReason::ProcessingError { err: expected_err.to_owned() }); + if reorg_after_reload || !reload_node { + handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Channel closed because of an exception: Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs."); + check_added_monitors!(nodes[1], 1); + check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyForceClosed { peer_msg: UntrustedString(format!("Channel closed because of an exception: {}", expected_err)) } + , [nodes[0].node.get_our_node_id()], 100000); + } + + check_closed_event!(nodes[0], 1, ClosureReason::ProcessingError { err: expected_err.to_owned() }, + [nodes[1].node.get_our_node_id()], 100000); assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1); nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear(); // Now check that we can create a new channel - create_announced_chan_between_nodes(&nodes, 0, 1, channelmanager::provided_init_features(), channelmanager::provided_init_features()); + if reload_node && nodes[0].node.per_peer_state.read().unwrap().len() == 0 { + // If we dropped the channel before reloading the node, nodes[1] was also dropped from + // nodes[0] storage, and hence not connected again on startup. We therefore need to + // reconnect to the node before attempting to create a new channel. + nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &Init { + features: nodes[1].node.init_features(), networks: None, remote_network_address: None + }, true).unwrap(); + } + create_announced_chan_between_nodes(&nodes, 0, 1); send_payment(&nodes[0], &[&nodes[1]], 8000000); } @@ -429,7 +421,7 @@ fn test_set_outpoints_partial_claiming() { let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]); let nodes = create_network(2, &node_cfgs, &node_chanmgrs); - let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1000000, 59000000, channelmanager::provided_init_features(), channelmanager::provided_init_features()); + let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1000000, 59000000); let (payment_preimage_1, payment_hash_1, _) = route_payment(&nodes[1], &[&nodes[0]], 3_000_000); let (payment_preimage_2, payment_hash_2, _) = route_payment(&nodes[1], &[&nodes[0]], 3_000_000); @@ -454,35 +446,34 @@ fn test_set_outpoints_partial_claiming() { // Connect blocks on node A commitment transaction mine_transaction(&nodes[0], &remote_txn[0]); check_closed_broadcast!(nodes[0], true); - check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed); + check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed, [nodes[1].node.get_our_node_id()], 1000000); check_added_monitors!(nodes[0], 1); // Verify node A broadcast tx claiming both HTLCs { let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap(); - // ChannelMonitor: claim tx, ChannelManager: local commitment tx + HTLC-Success*2 - assert_eq!(node_txn.len(), 4); + // ChannelMonitor: claim tx + assert_eq!(node_txn.len(), 1); check_spends!(node_txn[0], remote_txn[0]); - check_spends!(node_txn[1], chan.3); - check_spends!(node_txn[2], node_txn[1]); - check_spends!(node_txn[3], node_txn[1]); assert_eq!(node_txn[0].input.len(), 2); node_txn.clear(); } // Connect blocks on node B - connect_blocks(&nodes[1], 135); + connect_blocks(&nodes[1], TEST_FINAL_CLTV + LATENCY_GRACE_PERIOD_BLOCKS + 1); check_closed_broadcast!(nodes[1], true); - check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed); + check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed, [nodes[0].node.get_our_node_id()], 1000000); check_added_monitors!(nodes[1], 1); // Verify node B broadcast 2 HTLC-timeout txn let partial_claim_tx = { - let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap(); + let mut node_txn = nodes[1].tx_broadcaster.unique_txn_broadcast(); assert_eq!(node_txn.len(), 3); + check_spends!(node_txn[0], chan.3); check_spends!(node_txn[1], node_txn[0]); check_spends!(node_txn[2], node_txn[0]); assert_eq!(node_txn[1].input.len(), 1); assert_eq!(node_txn[2].input.len(), 1); - node_txn[1].clone() + assert_ne!(node_txn[1].input[0].previous_output, node_txn[2].input[0].previous_output); + node_txn.remove(1) }; // Broadcast partial claim on node A, should regenerate a claiming tx with HTLC dropped @@ -534,7 +525,7 @@ fn do_test_to_remote_after_local_detection(style: ConnectStyle) { *nodes[1].connect_style.borrow_mut() = style; let (_, _, chan_id, funding_tx) = - create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 100_000_000, channelmanager::provided_init_features(), channelmanager::provided_init_features()); + create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 100_000_000); let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 }; assert_eq!(funding_outpoint.to_channel_id(), chan_id); @@ -547,16 +538,11 @@ fn do_test_to_remote_after_local_detection(style: ConnectStyle) { assert!(nodes[0].node.list_channels().is_empty()); check_closed_broadcast!(nodes[0], true); check_added_monitors!(nodes[0], 1); - check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed); + check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed, [nodes[1].node.get_our_node_id()], 1000000); assert!(nodes[1].node.list_channels().is_empty()); check_closed_broadcast!(nodes[1], true); check_added_monitors!(nodes[1], 1); - check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed); - - // Drop transactions broadcasted in response to the first commitment transaction (we have good - // test coverage of these things already elsewhere). - assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0).len(), 1); - assert_eq!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0).len(), 1); + check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed, [nodes[0].node.get_our_node_id()], 1000000); assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty()); assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty()); @@ -593,7 +579,7 @@ fn do_test_to_remote_after_local_detection(style: ConnectStyle) { if let Event::SpendableOutputs { outputs } = node_a_spendable.pop().unwrap() { assert_eq!(outputs.len(), 1); let spend_tx = nodes[0].keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(), - Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, &Secp256k1::new()).unwrap(); + Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, None, &Secp256k1::new()).unwrap(); check_spends!(spend_tx, remote_txn_b[0]); } @@ -613,7 +599,7 @@ fn do_test_to_remote_after_local_detection(style: ConnectStyle) { if let Event::SpendableOutputs { outputs } = node_b_spendable.pop().unwrap() { assert_eq!(outputs.len(), 1); let spend_tx = nodes[1].keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(), - Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, &Secp256k1::new()).unwrap(); + Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, None, &Secp256k1::new()).unwrap(); check_spends!(spend_tx, remote_txn_a[0]); } }